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Netlab Reference Manual glmgrad
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<H1> glmgrad
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<h2>
Purpose
</h2>
Evaluate gradient of error function for generalized linear model.

<p><h2>
Synopsis
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<PRE>

g = glmgrad(net, x, t)
[g, gdata, gprior] = glmgrad(net, x, t)
</PRE>


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Description
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<CODE>g = glmgrad(net, x, t)</CODE> takes a generalized linear model
data structure <CODE>net</CODE> 
together with a matrix <CODE>x</CODE> of input vectors and a matrix <CODE>t</CODE>
of target vectors, and evaluates the gradient <CODE>g</CODE> of the error
function with respect to the network weights. The error function
corresponds to the choice of output unit activation function. Each row
of <CODE>x</CODE> corresponds to one input vector and each row of <CODE>t</CODE>
corresponds to one target vector.

<p><CODE>[g, gdata, gprior] = glmgrad(net, x, t)</CODE> also returns separately 
the data and prior contributions to the gradient.

<p><h2>
See Also
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<CODE><a href="glm.htm">glm</a></CODE>, <CODE><a href="glmpak.htm">glmpak</a></CODE>, <CODE><a href="glmunpak.htm">glmunpak</a></CODE>, <CODE><a href="glmfwd.htm">glmfwd</a></CODE>, <CODE><a href="glmerr.htm">glmerr</a></CODE>, <CODE><a href="glmtrain.htm">glmtrain</a></CODE><hr>
<b>Pages:</b>
<a href="index.htm">Index</a>
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<p>Copyright (c) Ian T Nabney (1996-9)


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